Pattern reversal evoked potential amplitudes: Life span changes

Pattern‐reversal visual evoked potentials in infants: gender differences during early visual maturation

“…In contrast, other investigators have shown larger amplitude VEPs in females compared with males in groups of older children or adults (Stockard et al 1979, Shearer and Dustman 1980, Snyder et al 1981, Allison et al 1983, Cohn et al 1985, Emmerson-Hanover et al 1994. Skull thickness is a major factor in VEP amplitude and it may be that this difference develops after infancy.…”

“…Although gender differences have been described in neurological and cognitive development (Waber 1977, Waber 1979, Nagy Jacklin and Martin 1999), gender differences have not been reported in studies of early VEP maturation. In adults, gender differences have been observed in the peak latencies and amplitudes of pattern-reversal VEPs, with females demonstrating shorter peak latencies and higher amplitudes than males (Stockard et al 1979, Erwin 1980, Shearer and Dustman 1980, Snyder et al 1981, Allison et al 1983, Cohn et al 1985, La Marche et al 1986, Celesia et al 1987, Chu 1987, Guthkelch et al 1987, Aso et al 1988, Emmerson-Hanover et al 1994. Possible explanations for gender differences in peak latencies of pattern-reversal VEPs have included higher core body temperature in females (Stockard et al 1979), gender differences in catecholamine levels (Vaccari 1980), and anatomical size differences between males and females (Stockard et al 1979, Allison et al 1983, Guthkelch et al 1987).…”

“…The majority of published studies have focused on gender differences in older children and adults (Stockard et al 1979, Erwin 1980, Shearer and Dustman 1980, Snyder et al 1981, Allison et al 1983, Cohn et al 1985, LaMarche et al 1986, Celesia et al 1987, Chu 1987, Guthkelch et al 1987, Aso et al 1988, Emmerson-Hanover et al 1994) with few studies reporting gender differences of the pattern-reversal VEP in infants. Visual and neural pathways undergo a period of rapid growth and development during the first six months of life, suggesting that this would be an optimal time to utilize the patternreversal VEP to investigate any gender differences arising during visual maturation.…”

Effects of aging on the temporal frequency characteristics determined by pattern visually evoked cortical potentials

“…The latency of the component (P100) is known to increase with age (Asselman, Chadwick & Marsden, 1975;Celesia & Daly, 1977;Shaw &Cant, 1980, and. On the contrary, it has been known that although the waveform of the pattern reversal VECP altered in infants (Spekreijse, 1978), no significant change with age over the rest of the life span was found (Celesia & Daly, 1977;Snyder, Dustman & Shearer, 1981;Halliday et al, 1982, and.…”

The influence of age on the electroretinogram and visual evoked potential

“…Age-related changes in the electrical responses of the retina and cortex are an important consideration when analysing clinical data. Various workers have separately investigated the effect of age on the normal ERG to flash stimulation (Karpe et al, 1950;Zetterstrom, 1956;Zeidler, 1959;Straub, 1961 ;Peterson, 1968;Weleber, 1981 ;Martin and Heckenlively, 1982) and on the flash VEP (Kooi and Bagchi, 1964;Copenhaver and Perry, 1964;Dustman and Beck, 1966;1969, Buchsbaum et al, 1974Dustman et al, 1977;Cosi et al, 1982) and the pattern reversal VEP (Asselman et al, 1975;Celesia and Daly, 1977;Allison et al, 1979Allison et al, , 1983Stockard et al, 1979;Shaw and Cant, 1981;Snyder et al, 1981;Sokol et al, 1981;Halliday et al, 1982). There are few studies on age-related changes in VEPs evoked by pattern onset-offset stimulation, which is a subject of considerable interest (de Vries-Khoe and Spekreijse, 1982;Spekreijse et al, 1973;Jeffreys, 1977).…”